**Step one: **Join a queue
**Step two:** Leave said queue
**Step three:** Join a custom game's queue/lobby
**Step four:** Leave the custom game's queue/lobby
**Step five:** ??? <-- I have no idea what happens internally, but something clearly does at this point
**Step six:** Attempt to join a queue
**Step seven:** Unexpected platform error!
Resulted in my being unable to join a queue, had to close and reopen the client.
**Computer:** HP 810-160
**OS:** Windows 8.1
**Processor:** Intel i7-4770
**RAM:** 16 GB
**Graphics Card:** NVIDIA GeForce GT 640